Index: wp-includes/comment.php
===================================================================
--- wp-includes/comment.php	(revision 17581)
+++ wp-includes/comment.php	(working copy)
@@ -107,7 +107,7 @@
  */
 function get_approved_comments($post_id) {
 	global $wpdb;
-	return $wpdb->get_results($wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1' ORDER BY comment_date", $post_id));
+	return $wpdb->get_results( apply_filters( 'get_approved_comments_query', $wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_approved = '1' ORDER BY comment_date", $post_id ), $post_id ) );
 }
 
 /**
@@ -475,7 +475,7 @@
 		}
 	}
 
-	return $comment_count;
+	return apply_filters( 'get_comment_count', $comment_count, $post_id );
 }
 
 //